Part of the production process of high quality cement is quality control of the raw materials as well as the intermediate and finished products. At each production stage samples are taken, processed and analyzed to determine the chemical composition of the material. For the fast, accurate and reliable determination of carbon and sulfur elemental analyzers using combustion technology are a useful addition to XRF analyzers. Apart from size reduction no further sample preparation is needed for analyzing a sample with an elemental analyzer. In contrast to XRF analysis the element content of carbon and sulfur can be measured from the ppm range up to 100 % and the results are usually obtained within 60 to 120 seconds.